Change-speed mechanism.



P. WEEKS.

CHANGESPEED MECHANISM. APPLICATION; FILED APR. 29. 1912. RENEWED JAN. I1916.

1,201,125. Patented Oct. 10,1916.

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UNITED STATES PATENT omen.

PAUL wee s, or LOS ANGEL S, CALIFORNIA, assionon TO FELLows manor rowan.TRANSMISSION co rAnY, or 'Los ANGELES, CALIFORNIA, A CORPORATION orARIZONA.

CHANGE-SPEED MECHANISM.

Application filed April 29, 1912, Serial No. 694,004. Renewed January11, 1916.

To all whom it may concern Be it known that 1, PAUL VEEKS, a citizen ofthe United States, residing at Los Angeles, in the county of Los Angelesand State of California, have invented new and useful Improvements inChange-SpeedMechanism, of which the following is a specification.

This invention relates to change speed mechanism of the intermittentgrip type, and the object ofthe invention is to place the mechanism inmost compact form, and to reduce the stroke of the oscillatory drivenmember to nothing when the parts are adjusted to neutral position. Indevices heretofore employed of the particular type of which this is animprovement, when the parts were adjusted to neutral position there wasstill a slight movement of the oscillatory device which, in thepresentinvention, I have eliminated by providing a construction whichenables the adjusting link which controls the movement of the centerjoint of the toggle to be adjusted into a position which coincides withthe pivotal connection between the oscillator and its driving link, sothat when the adjusting link is in this position, even though its freeend is operated through a wide are by thepitman driven from the crank,the link connected with the oscillatory device will swing uniformly withthe adjusting link and no motion will be given to the oscillatorydevice.

Another object is to provide a construction which will house the partsand enable them to run in a bath of oil, and a further object is toprovide guides for the toggle members which will prevent fleXure of thetoggle members and give them rigid support throughout their stroke.

Referring to the drawings: Figure 1 is a' vertical section through theinvention. Fig. 2 is a section on line 00 -00 Fig 1. Fig. 3 is a sectionon line 03 -50 Fig. 1. Fig. el is a side view in detail of one of thedog supporting arms. Fig. 5 is an end View of the dog supporting arm.Fig. 6 is a section on line av -m", Fig. 1. p v

1 designates a base to which is bolted the cap 2 which has a removabletop plate 3.

Supported in bearings 4 is the crank shaft 5 and supported in bearings 6is the rotating driven shaft 7. Rigidly secured on the driven shaft 7 isa series of grooved disks Specification of Letters Patent.

Patented Oct. 10, 1916.

Serial No. 71,573.

8. only one of which is herein shown. Each d sk 8 is driven by anoscillatory device consisting of a series of wedge-shaped dogs 9, eachdog 9 being carried on a shaft 10, shown in detail in Figs. 1 and 5,each shaft 10 being journaled in a pair of plates 11 which arev mountedto loosely rock on the shaft 7. Each shaft 10 has a leaf 12 with aconcave face 13, and a pin 11 bears againstthe concave face 13, the pin11 being slidable radially in an adjusting disk 15 and being outwardlypressed constantly by a spring 16. The regulating disk 15 is capable ofangular movement with respect to the disk 11, but rocks coincidentallywith the disk 11, it only having an angular movement with respectthereto when it is ad justed. An adjusting crank 19 pivoted in disk 11carries on its pivotal portion a segment gear 17 meshing with teeth 18in disk 15, (see Fig. 6). The outer end of the crank 19 rides in asegmental track 20 which is carried on a bar 21 and may be shifted toswing the crank 19 and shift the'disk 15 to cause the pins 14.- to tiltthe leaves 12 in either direction, and thereby rock the associated dogs9 into position to drive the grooved disks 8 in either direction, or'to' be moved to midposition where they will be out of contact with thegrooved disks 8.

Connected to the disks 11 are two links 22 which are connected to a pin23. A pitman 24 is connected to the pin 23 and to a crank 25 on thecrank shaft 5. The ends of the pin 23 slide between guides 26 and 27,the guides 26 being supported by studs 28 from the side wall 29 of'thebase 1, while the guides 27 are formed on'webs 30 which eX- tendlongitudinally through the base 1 and prevent lateral movement of thetoggle thus formed by the pitman 2a and links 22. Adjusting links 31extend from the pin 23 to an adjustment block 32 which slides oninclined guides 33, and the block '32 has a nut .34. which is engaged bya screw 35 with beveled gear 36 on its end, which meshes with a beveledgear'37 on a cross shaft 38, so that by turning the cross shaft 38thescrew 35 will be rotated to move the block 32 along the guides 33 andthus adjust the upper ends ofthe links 31 which will alter the pathdescribed by the center joint of the toggle and thereby vary the strokeof the oscillating device. When the block 32 is adjusted into theposition shown in Fig. 1, the greatest stroke will be given to theoscillating device, during the time the joint 41 travels in a pathdesignated by dotted line a in Fig. 1, while by moving the block 32 tothe extreme right it will bring the upper joint 39 of the links 31 intoaxial alinement with the joint 40 of the links 22 and, although thetoggle joint 41 takes its complete movement, the joint 40 will not bemoved angularly, but will remain at rest in close relation to the joint39, during which time the joint 41 travels in a path designated bydotted line b in Fig. 1, and thus no motion will be imparted to theoscillating device or driven shaft 7 because both links 31 and links 22swing on a common center in line with joint 40 and their lowerendstravel together at joint 41 along dotted line b. Intermediate speedsare obtained by adjusting the block 32 to intermediate points betweenthe extremes.

It is essential that the parts be proportioned and arranged so that allpoints of the various paths which are ever traversed by the joint 41,include the extreme paths designated at a and b, be located below astraight line drawn from shaft 4 to shaft 7 to prevent links 22 andconnecting rod 24 ever swinging into a straight line on a dead centerwith each other, which would make the device inoperative because undersuch conditionsthe momentum of the parts in swinging toward the deadcenter would carry the joint 41 past the dead center and stoppage ofmovement or breakage would occur.

What I claim is:

1. In a change speed gearing, a driven shaft, an oscillatory device onthe shaft, a

pitman, a link from the pitman to the oscillatory device, an adjustinglink connected to the joint between the pitman and first link, a guideextending toward the oscillatory device, and a cross head sliding on theguide, the outer end of the adjustment link being connected to the crosshead, and means for moving said crosshead in said guide to vary therelative position of said first link and said adjusting link, wherebythe stroke of the oscillatory device is varied from maximum to zero.

2. In a change speed gearing, a driven shaft, an oscillatory device onthe shaft, a pitman, a link from the pitman to the oscillatory device,an adjusting link connected to the joint between the pitman and firstlink, inclined guides extending to a point close to the oscillatorydevice, a block sliding in said guides, the upper end of the adjustinglink being pivoted to said block,

a nut carried by said block, a screw engaging said nut, and means'forrotating said screw to move said block in said guides to vary therelative position of said first link and said adjusting link, wherebythe stroke of the oscillatory device is varied from maximum to Zero.

3. In a change speed gearing, a driven shaft, an oscillatory device onthe shaft, a pitman, a link from the pitman to the oscillatory device,an adjusting link connected to the joint between the pitman and firstlink, means for adjusting the outer end of the adjustment link intoclose relation to the joint between the first link and oscillatorydevice to prevent movement of the oscillatory device when said adjustinglink is in such position, guides having faces on each side of the jointbetween the pitman, adjusting link and first link to prevent lateralfiexure thereof, and a pin extending through said latter joint, the endsof the pin bearing against said faces.

4. In a change speed gearing, a driven shaft, an oscillatory device onthe shaft, a pitman, a link from the pitman to the oscillatory device,an adjusting link connected to the joint between the pitman and firstlink, inclined guides extending to a point close to the oscillatorydevice, a block sliding in said guides, the upper end of the adjustinglink being pivoted to said block, a nut carried by said block, a screwengaging said nut, means for rotating said screw, and flat guide plateshaving faces on each side of the joint between the pitman adjusting linkand first link to prevent lateral movement of said joint.

5. In a change speed gearing, a driven shaft, an oscillatory device onsaid shaft, a pitman, a link connecting said pitman and said oscillatorydevice, an adjusting link, one end of which is connected to said pitmanand said first link, a sliding element, to which the other end of saidadjusting link is pivoted, and a screw for moving said sliding elementto vary the position of the pivot of said adjusting link to adjust thestroke of the oscillatory device from maximum to Zero.

In testimony whereof, I have hereunto set my hand at Los Angeles,California this 13th day of March 1912.

PAUL WEEKS.

In presence of G. T. HAOKLEY, GLADYS RUssELL.

Copies of this patent may be obtained for five cents each, by addressingthe "Gommissioner of Patents, Washington, D. Q.

